Arch Linux

Luca91

Member

Registered: 2019-02-13

Posts: 21

[HW ISSUE] Broken display sensor: laptop automatically goes to sleep

Hi all dear collegues,
I have this old laptop (late 2014) that I'm still using almost everyday.
It was working perfectly until last week, then I started to experience some weird stuff: the laptop aumotacially went to sleep a couple of times when I was typing!
After some debugging I realized that the problem was the sensor at the bottom of the display. It "thinks" that the display is closed.
I disabled the sleep mode form the plasma preferences, but the laptop is still barely usable due to the fact that the display still power off from time to time.
Is there any way to completely disable this sensor?

I know that the laptop is old, but I'd like to still use it for some time...

Thanks a lot,
Luca

EDIT: I forgot to say that I already have HandleLidSwitch=ignore and HandleLidSwitchDocked=ignore in my /etc/systemd/logind.conf, but the screen stil turn off very often...

Last edited by Luca91 (2021-12-27 21:45:23)

anarki@buttereblume

Member

Registered: 2015-12-29

Posts: 50

Re: [HW ISSUE] Broken display sensor: laptop automatically goes to sleep

Also put

HandleLidSwitchExternalPower=ignore

to logind.conf.

After a suspend event occured, have a look at the output of

dmesg | grep -i acpi

and see if it indeed was the LID key that triggered the event.

Last edited by anarki@buttereblume (2022-01-03 18:31:07)